Gas water heater

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a gas water heater which comprises a water inlet pipe, a heat exchanger and a water outlet pipe which are sequentially communicated, the water inlet pipe is provided with a flow sensor, and the water outlet pipe comprises a first water outlet section and a second water outlet section. The gas water heater further comprises a water tank and a bypass pipe, the water tank is provided with a first water inlet, a second water inlet, a water outlet and a flow slowing structure, the first water outlet section is communicated with the first water inlet, the second water outlet section is communicated with the water outlet, the second water inlet is located between the first water inlet and the water outlet, and the flow slowing structure is located between the first water inlet and the second water inlet. And one end of the bypass pipe is communicated with the water inlet pipe, the other end of the bypass pipe is communicated with the second water inlet, and the bypass pipe is provided with a water volume adjusting mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, in particular to a gas water heater. Background Art

[0002] Gas water heaters in the prior art often include a water inlet pipe, a heat exchanger and a water outlet pipe that are connected in sequence. The water inlet pipe is provided with a flow sensor. When a user turns on the shower or faucet to use the gas water heater, the water heater usually detects a certain amount of water flow through the flow sensor, and then ignites to heat the heat exchanger. Therefore, there will be a certain time difference when the gas water heater is started, resulting in a portion of the water not being fully heated.

[0003] When a user uses the gas water heater and encounters a situation where he needs to suspend the use of the gas water heater, for example, he needs to turn off the water to apply shower gel, during the pause time, the water in the heat exchanger will be further heated by the waste heat of the heat exchanger, resulting in the water temperature of that part being too high. When the user restarts the gas water heater, due to a certain time difference when the gas water heater is started, a part of the water cannot be fully heated. Therefore, when the user starts the gas water heater for the second time, the water outlet temperature will be too high and too low in succession, that is, the temperature difference between the two sections of water outlet will be extremely large, and then it returns to the preset temperature, resulting in a poor user experience. Utility Model Content

[0004] One of the technical problems solved by the utility model is to provide a gas water heater, which can effectively solve the problem of a large temperature difference between two consecutive water outlets when the gas water heater is started for the second time.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] A gas water heater comprises a water inlet pipe, a heat exchanger and a water outlet pipe which are connected in sequence, the water inlet pipe is provided with a flow sensor, the water outlet pipe comprises a first water outlet section and a second water outlet section, and the gas water heater further comprises:

[0007] A water tank, wherein the water tank is provided with a first water inlet, a second water inlet, a water outlet and a slow flow structure, the first water outlet section is connected to the first water inlet, the second water outlet section is connected to the water outlet, the second water inlet is located between the first water inlet and the water outlet, and the slow flow structure is located between the first water inlet and the second water inlet;

[0008] A bypass pipe, one end of which is connected to the water inlet pipe, and the other end of which is connected to the second water inlet, and the bypass pipe is provided with a water volume regulating mechanism.

[0009] Compared with the background technology, the gas water heater of the utility model has the following beneficial effects:

[0010] By providing a water tank and a bypass pipe, on the one hand, the portion of the water tank located between the second water inlet and the first water inlet can be used to receive water output from the heat exchanger to the first water inlet through the first water outlet section, so that when the gas water heater is started for the second time, the two sections of water with a large temperature difference output successively from the heat exchanger can be mixed in the part of the water tank between the second water inlet and the first water inlet, so that the heat of the part of water that is not fully heated can be compensated by using the overheated part of the water, thereby reducing the outlet water temperature difference between the two sections of water. On the other hand, by providing a bypass pipe, the cold water in a part of the water inlet pipe can flow directly through the bypass pipe to the inside of the water tank near the second water inlet, so as to be mixed with the hot water that enters from the part between the second water inlet and the first water inlet and between the second water inlet and the water outlet to obtain water of a preset temperature, so that at this time the heat exchanger needs to heat the water flowing through the heat exchanger to a temperature higher than the preset temperature, and then when the gas water heater is started for the second time, the overheated part of the water can store more heat, so as to provide more heat compensation for the part of the water that is not fully heated.

[0011] Furthermore, by arranging a slow-flow structure between the first water inlet and the second water inlet, a certain barrier can be formed for the water flowing from the vicinity of the first water inlet to the vicinity of the second water inlet, so as to prevent the hot water near the first water inlet from flowing quickly to the vicinity of the second water inlet and mixing with the cold water output from the second water inlet, so that the hot water can be retained for a longer time between the first water inlet and the slow-flow structure, and the heat of the hot water can be stored for a longer time between the first water inlet and the slow-flow structure, so that the heat stored between the first water inlet and the slow-flow structure can provide more heat compensation for the part of water that is not fully heated.

[0012] In one embodiment, the water tank has an energy storage chamber and a mixing chamber that are connected to each other, the energy storage chamber is connected to the first water inlet, the mixing chamber is connected to the second water inlet and the water outlet, and the slow flow structure is provided with a narrowing portion, which is located between the energy storage chamber and the mixing chamber, and the cross-sectional area of ​​the narrowing portion is smaller than the cross-sectional area of ​​the energy storage chamber.

[0013] In one embodiment, the slow-flow structure includes a baffle, which divides the internal space of the water tank into the energy storage chamber and the mixing chamber. The baffle is provided with a plurality of through holes at intervals, and the through holes are connected between the energy storage chamber and the mixing chamber. The plurality of through holes constitute the narrowing portion.

[0014] In one embodiment, the water tank includes a first sub-tank, a connecting pipe and a second sub-tank which are connected in sequence, the first sub-tank has the energy storage chamber, the second sub-tank has the mixing chamber, the bypass pipe is connected to the connecting pipe or to the second sub-tank, and the end of the connecting pipe connected to the first sub-tank constitutes the narrowing part of the slow flow structure.

[0015] In one embodiment, the volume of the energy storage chamber is smaller than the volume of the mixing chamber.

[0016] In one embodiment, the energy storage chamber and the mixing chamber are arranged along the direction of gravity, and the energy storage chamber is located above the mixing chamber.

[0017] In one embodiment, a flow-disturbing structure is provided in the water tank, and the flow-disturbing structure is located between the flow-slowing structure and the water outlet.

[0018] In one embodiment, the water volume regulating mechanism is a water proportional valve.

[0019] In one embodiment, the water volume regulating mechanism is a three-way water proportional valve, the water inlet pipe includes a first water inlet section and a second water inlet section, the water volume regulating mechanism is respectively connected to the first water inlet section, the second water inlet section and the bypass pipe, and the end of the second water inlet section away from the water volume regulating mechanism is connected to the heat exchanger.

[0020] In one embodiment, the water volume regulating mechanism is a switch valve, the gas water heater includes a plurality of the water volume regulating mechanisms, and all the water volume regulating mechanisms are connected in parallel.

[0021] In one of the embodiments, the water volume regulating mechanism is a switch valve, and a bypass branch pipe is further provided on the bypass pipe, and the bypass branch pipe is connected in parallel with at least one of the first water volume regulating mechanisms.

[0022] In one embodiment, the bypass branch pipe has a first end and a second end opposite to each other, the first end and the second end are both connected to the bypass pipe, and the first end is close to the water tank, the second end is close to the water inlet pipe, and the water volume regulating mechanism is arranged between the first end and the water tank, or the water volume regulating mechanism is arranged between the second end and the water inlet pipe.

[0023] In one embodiment, the gas water heater also includes a first temperature sensor, a second temperature sensor and a third temperature sensor, the first temperature sensor is arranged at the water inlet pipe, the second temperature sensor is arranged at the first water outlet section, and the third temperature sensor is arranged at the second water outlet section, and the water volume regulating mechanism, the first temperature sensor, the second temperature sensor and the third temperature sensor are all communicatively connected to the main controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a gas water heater provided in an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the partial structure of a water tank, a first water outlet section, a second water outlet section and a bypass pipe provided in one embodiment of the utility model;

[0026] Figure 3 A schematic diagram of the partial structure of a water tank, a first water outlet section, a second water outlet section and a bypass pipe provided in another embodiment of the utility model;

[0027] Figure 4 A schematic diagram of the partial structure of a water tank, a first water outlet section, a second water outlet section and a bypass pipe provided in yet another embodiment of the utility model;

[0028] Figure 5 A schematic diagram of the partial structure of a water tank, a first water outlet section, a second water outlet section and a bypass pipe provided in another embodiment of the utility model;

[0029] Figure 6 A schematic diagram of the local structure of a water tank (when a turbulent flow structure is provided in the mixing chamber) provided in an embodiment of the utility model;

[0030] Figure 7 A schematic diagram of the partial structure of a gas water heater provided in the first embodiment of the utility model;

[0031] Figure 8 A schematic diagram of a partial structure of a gas water heater provided in a second embodiment of the utility model;

[0032] Fig. 9 A schematic diagram of a partial structure of a gas water heater provided in a third embodiment of the utility model;

[0033] Fig.10 A schematic diagram of the partial structure of a gas water heater provided in a fourth embodiment of the utility model;

[0034] Description of labels:

[0035] 1. Gas water heater;

[0036] 10. water inlet pipe; 100. flow sensor; 101. first water inlet section; 102. second water inlet section;

[0037] 11. Heat exchanger;

[0038] 12, water outlet pipe; 121, first water outlet section; 122, second water outlet section;

[0039] 13, water tank; 13a, narrowing portion; 13b, first water inlet; 13c, second water inlet; 13d, water outlet; 131, energy storage chamber; 132, mixing chamber; 132a, first chamber; 132b, second chamber; 133, baffle; 133a, through hole; 134, first sub-tank; 135, connecting pipe; 136, second sub-tank;

[0040] 14, bypass pipe; 140, water volume regulating mechanism; 141, bypass branch pipe; 141a, first end; 141b, second end;

[0041] 15, spoiler structure; 150, spoiler tube; 150a, first spoiler hole; 151, partition structure; 151a, second spoiler hole;

[0042] 161. A first temperature sensor; 162. A second temperature sensor; 163. A third temperature sensor. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0046] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] like Figure 1 As shown, the utility model provides a gas water heater 1, comprising a water inlet pipe 10, a heat exchanger 11 and a water outlet pipe 12 which are connected in sequence, the water inlet pipe 10 is provided with a flow sensor 100, and the water outlet pipe 12 comprises a first water outlet section 121 and a second water outlet section 122. The gas water heater 1 also comprises a water tank 13 and a bypass pipe 14, the water tank 13 is provided with a first water inlet 13b, a second water inlet 13c, a water outlet 13d and a slow flow structure, the first water outlet section 121 is connected with the first water inlet 13b, the second water outlet section 122 is connected with the water outlet 13d, the second water inlet 13c is located between the first water inlet 13b and the water outlet 13d, the slow flow structure is located between the first water inlet 13b and the second water inlet 13c, one end of the bypass pipe 14 is connected with the water inlet pipe 10, and the other end is connected with the second water inlet 13c, and the bypass pipe 14 is provided with a water volume regulating mechanism 140.

[0048] By providing the water tank 13 and the bypass pipe 14, on the one hand, the portion of the water tank 13 between the second water inlet 13c and the first water inlet 13b can be used to receive the water output from the heat exchanger 11 to the first water inlet 13b through the first water outlet section 121, so that when the gas water heater 1 is started for the second time, the two sections of water with a large temperature difference output successively from the heat exchanger 11 can be mixed in the part of the water tank 13 between the second water inlet 13c and the first water inlet 13b, so that the heat of the part of the water that is not fully heated can be compensated by the overheated part of the water, thereby reducing the outlet water temperature difference between the two sections of water. On the other hand, By setting a bypass pipe 14, a portion of the cold water in the water inlet pipe 10 can flow directly through the bypass pipe 14 to the inside of the water tank 13 near the second water inlet 13c, so as to be mixed with the hot water that enters from the second water inlet 13c and the first water inlet 13b to the area between the second water inlet 13c and the water outlet 13d to obtain water of a preset temperature. At this time, the heat exchanger 11 needs to heat the water flowing through the heat exchanger 11 to a temperature higher than the preset temperature, and then when the gas water heater 1 is started for the second time, the overheated water can store more heat to provide more heat compensation for the water that is not fully heated.

[0049] Furthermore, by providing a slow-flow structure between the first water inlet 13b and the second water inlet 13c, a certain barrier can be formed for the water flowing from the vicinity of the first water inlet 13b to the vicinity of the second water inlet 13c, so as to prevent the hot water near the first water inlet 13b from flowing quickly to the vicinity of the second water inlet 13c and mixing with the cold water output from the second water inlet 13c, so that the hot water can be retained for a longer time between the first water inlet 13b and the slow-flow structure, so that the heat of the hot water can be stored for a longer time between the first water inlet 13b and the slow-flow structure, so that the heat stored between the first water inlet 13b and the slow-flow structure can provide more heat compensation for the part of the water that is not fully heated.

[0050] In one embodiment, the gas water heater 1 may include a burner (not shown in the figure), so that the burner can provide heat for the heat exchanger 11.

[0051] In one embodiment, the water tank 13 has a connected energy storage chamber 131 and a mixing chamber 132, the energy storage chamber 131 is connected to the first water inlet 13b, the mixing chamber 132 is connected to the second water inlet 13c and the water outlet 13d, and a narrowing portion 13a is provided in the water tank 13, the narrowing portion 13a is located between the energy storage chamber 131 and the mixing chamber 132, and the cross-sectional area of ​​the narrowing portion 13a is smaller than the cross-sectional area of ​​the energy storage chamber, so that, on the one hand, the energy storage chamber 131 of the water tank 13 can be used to receive the water output from the heat exchanger 11 through the first water outlet section 121, so that when the gas water heater 1 is started for the second time, the two sections of water with a large temperature difference output from the heat exchanger 11 are It can be mixed in the energy storage chamber 131 to utilize the overheated water to compensate for the heat of the water that is not fully heated, thereby reducing the outlet temperature difference of the two sections of water. On the other hand, by setting the bypass pipe 14, a portion of the cold water in the water inlet pipe 10 can flow directly to the mixing chamber 132 through the bypass pipe 14 to be mixed with the hot water entering the mixing chamber 132 from the energy storage chamber 131 to obtain water of a preset temperature. At this time, the heat exchanger 11 needs to heat the water flowing through the heat exchanger 11 to a temperature higher than the preset temperature. Then, when the gas water heater 1 is started for the second time, the overheated water can store more heat to provide more heat compensation for the water that is not fully heated.

[0052] The energy storage chamber 131 and the mixing chamber 132 may be provided integrally or separately.

[0053] Please combine Figure 2As shown, in one embodiment, a baffle 133 may be provided in the water tank 13, and the baffle 133 divides the internal space of the water tank 13 into an energy storage chamber 131 and a mixing chamber 132. That is, in this case, the slow flow structure includes a baffle 133, and the baffle 133 is provided with a plurality of through holes 133a at intervals, and the through holes 133a are connected between the energy storage chamber 131 and the mixing chamber 132. The plurality of through holes 133a constitute a narrowing portion 13a, so that on the one hand, the baffle 133 can reduce the possibility of hot water entering the energy storage chamber 131 directly mixing with the water in the mixing chamber 132, so that the heat carried by the hot water can be The hot water stays in the energy storage chamber 131 for a period of time to make the energy storage effect of the energy storage chamber 131 better. On the other hand, by setting the through hole 133a, the hot water in the energy storage chamber 131 can pass through the through hole 133a to enter the mixing chamber 132. Since the total opening area of ​​the through hole 133a on the baffle 133 is smaller than the total area of ​​one side plate surface of the baffle 133, the hot water in the energy storage chamber 131 can be accelerated when passing through the through hole 133a due to the reduction of the flow path, so that the hot water can enter the mixing chamber 132 at a faster speed, so that it is easier to be fully mixed with the cold water in the mixing chamber 132.

[0054] Please combine Figure 3 As shown, in another embodiment, the outer peripheral portion of the water tank 13 can also be narrowed to form a narrowed portion 13a with a narrowed flow path at the junction of the energy storage chamber 131 and the mixing chamber 132 inside the water tank 13, that is, at this time, the slow flow structure includes a narrowed portion of the water tank 13 structure, so that the flow path at the junction of the energy storage chamber 131 and the mixing chamber 132 can be narrowed by the narrowed portion 13a, and a certain resistance can be formed to the water flow in the process of the hot water in the energy storage chamber 131 entering the mixing chamber 132, so that the heat carried by the hot water can stay in the energy storage chamber 131 for a period of time, and the hot water will be accelerated due to the narrowing of the flow path when passing through the junction of the energy storage chamber 131 and the mixing chamber 132, so that it can enter the mixing chamber 132 at a faster speed, so as to be more easily mixed with the cold water in the mixing chamber 132.

[0055] Furthermore, the shape of the water tank 13 can be partially narrowed outside the water tank 13 to obtain the narrowed portion 13a, thereby eliminating the need to process the water tank 13 inside the water tank 13 and making the molding process of the narrowed portion 13a less difficult.

[0056] Please combine Figure 4 and Figure 5 As shown, in another optional embodiment, the water tank 13 includes a first sub-tank 134, a connecting pipe 135 and a second sub-tank 136 that are connected in sequence, the first sub-tank 134 has an energy storage chamber 131, the second sub-tank 136 has a mixing chamber 132, the second water inlet 13c is provided at the connecting pipe 135, and the bypass pipe 14 is connected to the connecting pipe 135 to be indirectly connected to the mixing chamber 132 through the connecting pipe 135 (such as Figure 4 Alternatively, the second water inlet 13c is provided in the second sub-tank 136, and the bypass pipe 14 is connected to the second sub-tank 136 to directly connect to the mixing chamber 132 (as shown in FIG. Figure 5 As shown in FIG. 1 , one end of the connecting pipe 135 connected to the first sub-tank 134 forms a narrowing portion 13a, thereby separating the energy storage chamber 131 from the mixing chamber 132, that is, the energy storage chamber 131 and the mixing chamber 132 are separated by the connecting pipe 135, which can further reduce the possibility of hot water entering the energy storage chamber 131 directly mixing with the water in the mixing chamber 132, so as to achieve a better energy storage effect of the energy storage chamber 131. At this time, the slow flow structure includes at least part of the connecting pipe 135 located between the second water inlet 13c and the first water inlet 13b.

[0057] Since the larger the water capacity of the heat exchanger 11, the longer the time the water receives heat exchange in the heat exchanger 11, the smaller the problem of the new cold water entering the heat exchanger 11 being difficult to obtain sufficient heating due to the start-up time difference when the gas water heater 1 is started for the second time, but the larger the volume of the heat exchanger 11, the higher the material cost, and the smaller the water capacity of the heat exchanger 11, the shorter the time the water receives heat exchange in the heat exchanger 11, so when the gas water heater 1 is started for the second time, the greater the problem of the new cold water entering the heat exchanger 11 being difficult to obtain sufficient heating due to the start-up time difference, and at this time, the smaller the volume of the heat exchanger 11 and the lower the material cost.

[0058] Therefore, this embodiment is more suitable for the case where the water capacity of the heat exchanger 11 used is smaller. Since the water capacity of the heat exchanger 11 is smaller, the amount of superheated water output from the heat exchanger 11 after the gas water heater 1 is started for the second time is smaller, so the required volume of the energy storage chamber 131 is also smaller. Based on this, in one of the embodiments, the volume of the energy storage chamber 131 is smaller than the volume of the mixing chamber 132, so that in the limited internal space of the gas water heater 1, the volume of the energy storage chamber 131 can meet the use requirements while making the mixing chamber 132 larger, so that the hot water output from the energy storage chamber 131 and the cold water output from the bypass pipe 14 can be mixed longer and more fully in the mixing chamber 132, so as to further reduce the temperature change amplitude of the water transported from the mixing chamber 132 to the second water outlet section 122.

[0059] Since liquid water has the characteristic that the higher the temperature, the lower the density, therefore, the hot water entering the inner cavity of the water tank 13 from the first water outlet section 121 is easy to float to the top of the inner cavity of the water tank 13 along the gravity direction, and the cold water entering the inner cavity of the water tank 13 from the pipe mouth of the bypass pipe 14 is easy to sink to the bottom of the inner cavity of the water tank 13 along the gravity direction. Based on this, in one embodiment, the energy storage chamber 131 and the mixing chamber 132 are arranged along the gravity direction, and the energy storage chamber 131 is located above the mixing chamber 132, so that the relative positions of the energy storage chamber 131 and the mixing chamber 132 conform to the laws of nature. Regardless of whether there is a partition structure 151 between the energy storage chamber 131 and the mixing chamber 132, the energy storage effect of the energy storage chamber 131 and the mixing effect of the mixing chamber 132 can be made more reliable, wherein, Figures 2 to 5 The arrows in the figure show the up and down directions of the water tank 13 along the gravity direction when in use.

[0060] In other embodiments, the energy storage chamber 131 and the mixing chamber 132 may also be arranged in the horizontal direction, and there is a partition structure 151 such as a baffle 133 or a connecting pipe 135 between the energy storage chamber 131 and the mixing chamber 132, so that the energy storage effect of the energy storage chamber 131 and the mixing effect of the mixing chamber 132 can meet the use requirements while making the arrangement of the energy storage chamber 131 and the mixing chamber 132 more flexible so as to be able to adapt to more different setting space conditions inside the gas water heater 1.

[0061] Please combine Figure 1 and Figure 6 As shown, in one embodiment, a turbulence structure 15 is further provided in the water tank 13, and the turbulence structure 15 is located between the slow flow structure and the water outlet 13d, so that the water flowing in the water tank 13 can be more easily turbulent through the turbulence structure 15, so that the cold water and hot water in the water tank 13 can be more easily mixed fully.

[0062] When the water tank 13 has the energy storage chamber 131 and the mixing chamber 132 which are connected as described in the above technical solution, the flow disturbance structure 15 is located in the mixing chamber 132 .

[0063] In an exemplary embodiment, the spoiler structure 15 includes a spoiler cylinder 150, the interior of the spoiler cylinder 150 is connected to the bypass pipe 14, and a plurality of first spoiler holes 150a are arranged at intervals on the spoiler cylinder 150. The first spoiler holes 150a are connected between the interior of the spoiler cylinder 150 and the interior of the water tank 13, so that the cold water in the bypass pipe 14 needs to flow through the interior of the spoiler cylinder 150 and the first spoiler holes 150a in sequence to enter the mixing chamber 132. Since the total opening area of ​​the first spoiler holes 150a on the baffle 133 is smaller than the total area of ​​the outer surface of the spoiler cylinder 150, the cold water can be accelerated when passing through the first spoiler holes 150a due to the reduction of the flow path, so that the cold water can more easily form a turbulent flow after entering the mixing chamber 132, so that it is easier to fully mix with the hot water in the mixing chamber 132.

[0064] When the water tank 13 has the energy storage chamber 131 and the mixing chamber 132 as described in the above embodiments, the spoiler tube 150 is located in the mixing chamber 132 , and the first spoiler hole 150 a communicates between the inside of the spoiler tube 150 and the mixing chamber 132 .

[0065] In another exemplary embodiment, the spoiler structure 15 includes a partition structure 151, the partition structure 151 divides the mixing chamber 132 into a first chamber 132a and a second chamber 132b, the energy storage chamber 131 and the bypass pipe 14 are both connected to the first chamber 132a, and a plurality of second spoiler holes 151a are arranged on the partition structure 151 at intervals, and the second spoiler holes 151a are connected between the first chamber 132a and the second chamber 132b, so that the hot water in the energy storage chamber 131 and the cold water in the bypass pipe 14 need to enter the first chamber 132a and then flow through the second chamber 132a. The spoiler hole 151a is used to enter the second chamber 132b, so that on the one hand, hot water and cold water can be mixed when passing through the second spoiler hole 151a together. On the other hand, since the total opening area of ​​the second spoiler hole 151a on the partition structure 151 is smaller than the total area of ​​the surface of one side of the partition structure 151, the cold water and hot water can be accelerated due to the reduction of the flow path when passing through the second spoiler hole 151a, so that the cold water and hot water can more easily form a turbulence after entering the second chamber 132b, so that it is easier to fully mix with the hot water in the second chamber 132b.

[0066] When the baffle 133 is provided in the water tank 13 as described in the above-mentioned embodiment, the through holes 133a on the baffle 133 are all connected between the energy storage cavity 131 and the first cavity 132a.

[0067] In another exemplary embodiment, the spoiler structure 15 may include both the spoiler tube 150 and the partition structure 151 , so as to further enhance the degree of mixing of hot water and cold water in the mixing chamber 132 .

[0068] The water volume regulating mechanism 140 may have a variety of different specific structures. Next, several different water volume regulating mechanisms 140 will be introduced with examples.

[0069] Please see again Figure 1 In one embodiment, the water volume regulating mechanism 140 is a water proportional valve, and the water volume regulating mechanism 140 can be used to adjust the water flow of the bypass pipe 14 in multiple stages, or can be used to steplessly adjust the water flow of the bypass pipe 14 to adjust the bypass ratio of the gas water heater 1 with high precision.

[0070] In one embodiment, the water volume regulating mechanism 140 is a switch valve, that is, the water volume regulating mechanism 140 is a valve with only two states, closed and open, and in the open state, the flow path of the water volume regulating mechanism 140 is fixed to a set flow path. A water volume regulating mechanism 140 disposed in the bypass pipe 14 can be used to make the water flow in the bypass pipe 14 a fixed flow, or to close the bypass pipe 14 so that water does not flow, in other words, to achieve two-stage adjustment of the water flow in the bypass pipe 14.

[0071] In other embodiments, more adjustments to the water flow in the bypass pipe 14 can be achieved by disposing a variety of different bypass pipes 14 and water volume regulating mechanisms 140 .

[0072] like Figure 7 As shown, in one embodiment, the water volume regulating mechanism 140 is a switch valve, and the gas water heater 1 includes a plurality of water volume regulating mechanisms 140 , and all water volume regulating mechanisms 140 are connected in parallel, so that the overall water flow of the bypass pipe 14 can be adjusted by the water volume regulating mechanism 140 .

[0073] For example, Figure 7 It is shown in the figure that there are two water volume regulating mechanisms 140, so that when both water volume regulating mechanisms 140 are closed, no water flows in the bypass pipe 14; when one of the two water volume regulating mechanisms 140 is opened and the other is closed, the overall water flow rate of the bypass pipe 14 is equivalent to the water flow rate in the opened water volume regulating mechanism 140; when both water volume regulating mechanisms 140 are opened, the overall water flow rate of the bypass pipe 14 is equivalent to the sum of the water flow rates in the two water volume regulating mechanisms 140, thereby realizing multi-stage adjustment of the water flow rate of the bypass pipe 14.

[0074] Among them, if the water flow rates of the two water volume regulating mechanisms 140 are the same when they are in the open state, that is, the predetermined flow paths of the two water volume regulating mechanisms 140 are the same, then among the two water volume regulating mechanisms 140, when one is opened and the other is closed, no matter which one is opened, the overall water flow rate of the bypass pipe 14 is the same. Therefore, at this time, three-level adjustment of the water flow rate of the bypass pipe 14 can be achieved.

[0075] If the water flow rates of the two water volume regulating mechanisms 140 are different when they are open, that is, the predetermined flow paths of the two water volume regulating mechanisms 140 are different, then when one of the two water volume regulating mechanisms 140 is opened and the other is closed, when the two water volume regulating mechanisms 140 are opened respectively, the overall water flow rate of the bypass pipe 14 is different. Therefore, at this time, four-level adjustment of the water flow rate of the bypass pipe 14 can be achieved.

[0076] like Figure 8 As shown, in one embodiment, the water volume regulating mechanism 140 is a switch valve, and a bypass branch pipe 141 is also provided on the bypass pipe 14. The bypass branch pipe 141 is connected in parallel with at least one water volume regulating mechanism 140 so that the overall water flow of the bypass pipe 14 can be adjusted through the water volume regulating mechanism 140.

[0077] For example, Figure 8 It is shown that there is only one water flow regulating mechanism 140, so that when the water flow regulating mechanism 140 is closed, the overall water flow of the bypass pipe 14 is equivalent to the water flow in the bypass branch pipe 141, and when the water flow regulating mechanism 140 is opened, the overall water flow of the bypass pipe 14 is equivalent to the sum of the water flow in the bypass branch pipe 141 and the water flow passing through the water flow regulating mechanism 140, thereby realizing two-stage adjustment of the water flow of the bypass pipe 14.

[0078] In addition, when the bypass branch pipe 141 is connected in parallel with the plurality of water volume regulating mechanisms 140 , the plurality of water volume regulating mechanisms 140 are connected in parallel in pairs, and the bypass branch pipe 141 is connected in parallel with the plurality of water volume regulating mechanisms 140 .

[0079] like Fig. 9 As shown, further, the bypass branch pipe 141 has a first end 141a and a second end 141b opposite to each other, the first end 141a and the second end 141b are both connected to the bypass pipe 14, and the first end 141a is close to the water tank 13, and the second end 141b is close to the water inlet pipe 10, and a water volume regulating mechanism 140 is provided between the first end 141a and the water tank 13, or a water volume regulating mechanism 140 is provided between the second end 141b and the water inlet pipe 10, so that when the water between the first end 141a and the water tank 13 or the second end 141b and the water inlet pipe 10 When the water volume regulating mechanism 140 is closed, no water flows in the bypass pipe 14. When the water volume regulating mechanism 140 between the first end 141a and the water tank 13 or between the second end 141b and the water inlet pipe 10 is opened, the water flow rate of the bypass pipe 14 as a whole is at least the water flow rate in the bypass branch pipe 141. At this time, as described in the above technical solution, the water volume regulating mechanism 140 connected in parallel with the bypass branch pipe 141 (that is, the water volume regulating mechanism 140 provided between the first end 141a and the second end 141b) can be used to adjust the water flow rate of the bypass pipe 14 as a whole. Fig. 9The example shows that a water volume regulating mechanism 140 is provided between the second end 141 b and the water inlet pipe 10 , and there is only one water volume regulating mechanism 140 connected in parallel with the bypass branch pipe 141 .

[0080] like Fig.10 As shown, in one embodiment, the water volume regulating mechanism 140 is a three-way water proportional valve, the water inlet pipe 10 includes a first water inlet section 101 and a second water inlet section 102, the flow sensor 100 is arranged in the first water inlet section 101, the water volume regulating mechanism 140 is respectively connected to the first water inlet section 101, the second water inlet section 102 and the bypass pipe 14, and the end of the second water inlet section 102 away from the water volume regulating mechanism 140 is connected to the heat exchanger 11. The water volume regulating mechanism 140 can receive cold water output from the first water inlet section 101, and adjust the ratio of cold water flowing to the bypass pipe 14 and the second water inlet section 102, thereby adjusting the bypass ratio of the gas water heater 1.

[0081] In the case where the gas water heater 1 is started a second time in a short period of time, the flow rate of cold water delivered to the mixing chamber 132 through the bypass pipe 14 can be reduced by adjusting the water volume regulating mechanism 140 so that at least one water volume regulating mechanism 140 is closed. This is to reduce the temperature drop of the hot water and cold water mixed in the mixing chamber 132 from the energy storage chamber 131 when the overall water temperature in the energy storage chamber 131 decreases during the second start-up. This makes the temperature of the water delivered from the mixing chamber 132 to the second water outlet section 122 more stable, thereby further reducing the temperature fluctuation of the water output by the gas water heater 1.

[0082] In addition, since the water supply of the gas water heater 1 usually shares a water supply pipe with the user's other faucets, during the use of the gas water heater 1, there may be a situation where the water flow received by the water inlet pipe 10 of the gas water heater 1 suddenly decreases or increases due to the opening or closing of other faucets in the shared water supply pipe.

[0083] When the water flow received by the water inlet pipe 10 suddenly decreases, the water flow in the heat exchanger 11 decreases, but the heating supply of the heat exchanger 11 remains stable in a short period of time, which will cause the water flowing through the heat exchanger 11 to be overheated in a short period of time, thereby causing the water temperature output from the second water outlet section 122 of the gas water heater 1 to suddenly increase.

[0084] Therefore, when the flow sensor 100 detects that the water flow in the water inlet pipe 10 decreases, the water volume regulating mechanism 140 can be opened to increase the bypass ratio of the cold water transported to the mixing chamber 132 through the bypass pipe 14, so that the superheated hot water output from the heat storage chamber to the mixing chamber 132 can be mixed with sufficient cold water in the mixing chamber 132, thereby making the water temperature transported from the mixing chamber 132 to the second water outlet section 122 more stable, thereby reducing the temperature fluctuation amplitude of the water output by the gas water heater 1.

[0085] When the water flow received by the water inlet pipe 10 suddenly increases, the water flow in the heat exchanger 11 increases, but the heating supply of the heat exchanger 11 remains stable in a short time. As a result, the water flowing through the heat exchanger 11 cannot be fully heated in a short time, thereby causing the water temperature output from the second water outlet section 122 of the gas water heater 1 to suddenly drop.

[0086] Therefore, when the flow sensor 100 detects an increase in the water flow in the water inlet pipe 10, the water volume regulating mechanism 140 can be closed to reduce the bypass ratio of the cold water transported to the mixing chamber 132 through the bypass pipe 14, so that the hot water with reduced temperature output from the heat storage chamber to the mixing chamber 132 can be mixed with a smaller amount of cold water in the mixing chamber 132, thereby making the water temperature transported from the mixing chamber 132 to the second water outlet section 122 more stable, so as to reduce the temperature fluctuation amplitude of the water output by the gas water heater 1.

[0087] Please see again Figure 1 In one embodiment, the gas water heater 1 further includes a first temperature sensor 161, a second temperature sensor 162 and a third temperature sensor 163. The first temperature sensor 161 is arranged on the water inlet pipe 10, the second temperature sensor 162 is arranged on the first water outlet section 121, and the third temperature sensor 163 is arranged on the second water outlet section 122, so that the inlet water temperature of the water inlet pipe 10 can be monitored by the first temperature sensor 161, the hot water temperature output by the heat exchanger 11 can be monitored by the second temperature sensor 162, and the outlet water temperature of the second water outlet section 122 can be monitored by the third temperature sensor 163, so as to better detect the inlet water temperature, the working condition of the heat exchanger 11 and the actual outlet water temperature of the gas water heater 1.

[0088] In one embodiment, the water volume regulating mechanism 140, the first temperature sensor 161, the second temperature sensor 162 and the third temperature sensor 163 are all connected to a main controller (not shown in the figure) by wired or wireless communication. The main controller may include a chip having capabilities including but not limited to storage, calculation, and signal output and reception, so that the main controller can adjust the water flow rate of the bypass pipe 14 by controlling the water volume regulating mechanism 140 when the actual outlet water temperature of the gas water heater 1 changes, according to the inlet water temperature and the working condition of the heat exchanger 11, so as to adjust the bypass ratio of the gas water heater 1, and then adjust the actual outlet water temperature of the gas water heater 1, so as to make the actual outlet water temperature of the gas water heater 1 more stable.

[0089] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A gas water heater, comprising a water inlet pipe (10), a heat exchanger (11) and a water outlet pipe (12) connected in sequence, wherein the water inlet pipe (10) is provided with a flow sensor (100), characterized in that: The water outlet pipe (12) comprises a first water outlet section (121) and a second water outlet section (122), and the gas water heater (1) further comprises: A water tank (13), the water tank (13) being provided with a first water inlet (13b), a second water inlet (13c), a water outlet (13d) and a slow-flow structure, the first water outlet section (121) being in communication with the first water inlet (13b), the second water outlet section (122) being in communication with the water outlet (13d), the second water inlet (13c) being located between the first water inlet (13b) and the water outlet (13d), and the slow-flow structure being located between the first water inlet (13b) and the second water inlet (13c); A bypass pipe (14), one end of the bypass pipe (14) is connected to the water inlet pipe (10), and the other end is connected to the second water inlet (13c), and the bypass pipe (14) is provided with a water volume regulating mechanism (140).

2. The gas water heater according to claim 1, characterized in that: The water tank (13) comprises an energy storage chamber (131) and a mixing chamber (132) which are connected to each other; the energy storage chamber (131) is connected to the first water inlet (13b); the mixing chamber (132) is connected to the second water inlet (13c) and the water outlet (13d); the slow flow structure is provided with a narrowing portion (13a); the narrowing portion (13a) is located between the energy storage chamber (131) and the mixing chamber (132); and the cross-sectional area of ​​the narrowing portion (13a) is smaller than the cross-sectional area of ​​the energy storage chamber.

3. The gas water heater according to claim 2, characterized in that: The slow-flow structure comprises a baffle (133), wherein the baffle (133) divides the internal space of the water tank (13) into the energy storage chamber (131) and the mixing chamber (132), and the baffle (133) is provided with a plurality of through holes (133a) at intervals, wherein the through holes (133a) are connected between the energy storage chamber (131) and the mixing chamber (132), and the plurality of through holes (133a) constitute the narrowing portion (13a).

4. The gas water heater according to claim 2, characterized in that: The water tank (13) comprises a first sub-tank (134), a connecting pipe (135) and a second sub-tank (136) which are connected in sequence, the first sub-tank (134) having the energy storage chamber (131), the second sub-tank (136) having the mixing chamber (132), the bypass pipe (14) being connected to the connecting pipe (135) or the second sub-tank (136), and the end of the connecting pipe (135) connected to the first sub-tank (134) constituting the narrowing portion (13a) of the slow flow structure.

5. The gas water heater according to any one of claims 2 to 4, characterized in that: The volume of the energy storage chamber (131) is smaller than the volume of the mixing chamber (132).

6. The gas water heater according to any one of claims 2 to 4, characterized in that: The energy storage chamber (131) and the mixing chamber (132) are arranged along the direction of gravity, and the energy storage chamber (131) is located above the mixing chamber (132).

7. The gas water heater according to any one of claims 1 to 4, characterized in that: A flow disturbance structure (15) is provided in the water tank (13), and the flow disturbance structure (15) is located between the slow flow structure and the water outlet (13d).

8. The gas water heater according to claim 1, characterized in that: The water volume regulating mechanism (140) is a water proportional valve.

9. The gas water heater according to claim 1, characterized in that: The water volume regulating mechanism (140) is a three-way water proportional valve, the water inlet pipe (10) comprises a first water inlet section (101) and a second water inlet section (102), the flow sensor (100) is arranged in the first water inlet section (101), the water volume regulating mechanism (140) is respectively connected to the first water inlet section (101), the second water inlet section (102) and the bypass pipe (14), and the end of the second water inlet section (102) away from the water volume regulating mechanism (140) is connected to the heat exchanger (11).

10. The gas water heater according to claim 1, characterized in that: The water volume regulating mechanism (140) is a switch valve, and the gas water heater (1) comprises a plurality of the water volume regulating mechanisms (140), and all the water volume regulating mechanisms are connected in parallel.

11. The gas water heater according to claim 1, characterized in that: The water volume regulating mechanism (140) is a switch valve. The bypass pipe (14) is also provided with a bypass branch pipe (141). The bypass branch pipe (141) is connected in parallel with at least one of the water volume regulating mechanisms (140).

12. The gas water heater according to claim 11, characterized in that: The bypass branch pipe (141) has a first end (141a) and a second end (141b) opposite to each other. The first end (141a) and the second end (141b) are both connected to the bypass pipe (14), and the first end (141a) is close to the water tank (13), and the second end (141b) is close to the water inlet pipe (10). The water volume regulating mechanism (140) is arranged between the first end (141a) and the water tank (13), or the water volume regulating mechanism (140) is arranged between the second end (141b) and the water inlet pipe (10).

13. The gas water heater according to claim 1 or any one of claims 8 to 12, characterized in that: The gas water heater (1) further comprises a first temperature sensor (161), a second temperature sensor (162) and a third temperature sensor (163); the first temperature sensor (161) is arranged on the water inlet pipe (10); the second temperature sensor (162) is arranged on the first water outlet section (121); the third temperature sensor (163) is arranged on the second water outlet section (122); the water volume regulating mechanism (140), the first temperature sensor (161), the second temperature sensor (162) and the third temperature sensor (163) are all communicatively connected to a main controller.

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